Engineering Notes
Technical notes from building Kouji Apps.
A practical archive of app development, automation, and operation decisions collected while building and running real products.
Minimum AI Knowledge for Practical Use, Part 2: Context Matters More Than Prompt Wording
Good AI output depends less on fancy prompt wording and more on the context you provide. This post explains how to package useful context for development work.
What I Check First When AI Coding Agents Get Updated
AI coding agents are moving from suggestions to delegated work. These are the checks I care about before using them in a real personal project.
Why I Check Update Notices Before Trusting AI Coding Tools
As AI coding tools move closer to local files, terminals, and deployment workflows, update notices and installation trust become part of the engineering checklist.
How I Compare Codex, Claude Code, and GitHub Copilot Agent
When AI coding tools become agents instead of autocomplete, I care less about feature lists and more about permissions, verification, cost, and workflow fit.
My Pre-Submission Checklist Before App Store Review
A practical checklist for App Store review preparation: privacy policy, permission strings, screenshots, review notes, backend status, and existing user impact.
Why Running a Personal App Eventually Needs a Website and a Blog
A practical note on why a personal app eventually needs more than an App Store page: a website, policy pages, support links, and operation notes.
What I Still Check Manually When Using AI Coding Tools
AI coding tools can move fast, but build results, deployments, security, cost, policy, and user impact still need human review.
Why I Chose Cloudflare After Comparing a Bunch of Blog Options
A practical look at why I moved from thinking about traditional blog platforms to building a small Cloudflare-based blog stack for Kouji Apps.